This problem has been occurring with me for the past month.
I do not send out very many tweets but at this time I cannot send out tweets through my eBay lots.
I cannot tweet directly on the twitter site with eBay lot links I copy and paste either.
The new filter system installed to stop spammers appears flawed or too strong.
Sorry if the truth hurts. This post has been revised for complainers.
Problem is fixed for me now because I directly contacted support on it and once again changed my password.
Don’t know how long it will last though.